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-rw-r--r--generic/Geo.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/generic/Geo.c b/generic/Geo.c
index 48471d3..085ff87 100644
--- a/generic/Geo.c
+++ b/generic/Geo.c
@@ -1200,8 +1200,8 @@ PointPolarToCartesian(ZnReal heading,
ZnReal to_angle;
/* Compute angle in trigonometric system */
- to_angle = DegreesToRadian(theta) + heading - M_PI_2;
- /* to_angle = heading - DegreesToRadian(theta);*/
+ /* to_angle = DegreesToRadian(theta) + heading - M_PI_2;*/
+ to_angle = heading - DegreesToRadian(theta) - M_PI_2;
/* Compute cartesian coordinates */
*delta_x = rho * cos(to_angle);
*delta_y = rho * sin(to_angle);